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Maintenance - Dishwasher

Repair Dishwashers Last Updated 09/03/2015

To keep the dishwasher performing at its best, it is important to periodically clean the spray arms and filters.


Cleaning the dishwasher's spray arms is important to ensure there is no debris blocking the water jet holes.

    1. Be sure that the water jet holes are not blocked by food particles.

      Spray Arm Holes
    2. If cleaning is needed, lift up on the lower spray arm in order to remove it.

      Lower Spray Arm Removal
    3. Clean the spray arm by removing any food particles that are blocking the water jet holes, and rinsing with water until water flows freely through the water jet holes.

      Spray Arm Cleaning
    4. After cleaning the lower spray arm, replace it by pushing down until it clips into place. Be sure that the spray arm is able to turn freely.

      Lower Spray Arm Replacement
    1. Pull the upper rack forward. Be sure that the water jet holes are not blocked by any food particles.

      Upper Spray Arm Removal
    2. When cleaning is necessary, remove the upper spray arm by turning the nut on the bottom of the spray arm 1/8 turn counterclockwise and pulling it down.

      Upper Spray Arm Removal
    3. Once the upper spray arm has been cleaned, press it up into place. Turn the nut 1/8 turn clockwise to make sure that the nut has locked back into place.

      Upper Spray Arm Replacement
    1. Check the water jet holes to be sure they are not blocked by any food particles.

      Spray Arm Holes
    2. When cleaning is needed, remove the spray arm by disassembling the hook from the bracket which holds the top spray arm assembly to the tub. Use a flat-head screwdriver if needed to remove the top spray arm.

      Top Spray Arm Removal
    3. Clean the spray arm and replace it by sliding it into place. MAKE SURE the retainer clip engages.

      Top Spray Arm Replacement

    Note: Spray arm disassembly and reassembly instructions may vary depending on your model. Refer to your owner's manual here for specific instructions for your model.
    For more information on cleaning your dishwasher's spray arm, refer to our Video Library video LG Dishwasher Spray Arm Maintenance.

Note: Some models do not have a 3-stage filter in the bottom of the tub. Instead, some models have a self-cleaning filter system that continuously cleans the water as it circulates. The self-cleaning filter grinds food into small particles before going down the drain. In this case, cleaning the filters is not necessary.

For models with filters in the bottom of the tub:

  1. Remove the lower rack.

    Lower Rack Removal
  2. Turn the mesh filter counterclockwise.

    Filter Removal
  3. Take out the mesh filter, upper STS filter, and the outer filter.

    Bottom Filter Removal
  4. Clean the filters using non-abrasive materials and warm water.

    Filter Cleaning
  5. Replace the filters in reverse order.

    Filter Replacement

For more information on cleaning your dishwasher's spray arm, refer to our Video Library video LG Dishwasher - Cleaning The Filters.

Note:

  • The look of your filters and removal instructions may vary slightly from the instructions above. Refer to your owner's manual here for model specific instructions.
  • For best wash performance, clean the filter after each load.
  • Before starting a cycle, make sure that the filter is assembled correctly. If the filter is not assembled properly, poor cleaning performance may be experienced.
  • For areas with hard water, it is recommended to clean the filter at least once a month to prevent poor wash performance.

When running a maintenance cycle, be sure that all of the dishes have been removed. Leave the racks in the dishwasher.

  1. Place a cup with 1-2 cups of white vinegar on the bottom rack.

  2. Select the NORMAL cycle.

  3. Close the door.

This cycle may also be performed with a dishwasher cleaner instead of vinegar.

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